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39db791bf3
Main occurrence is the operator tree code. This commit changes
OpBranches [OpTree ty op] [op]
to
OpBranches (NonEmpty (OpTree ty op)) [op]
such that the calls to `head`/`tail`/`last` can then be replaced by pattern
matching on `:|` or by using the total replacements from `Data.List.NonEmpty`.
Still, we need to call `NE.fromList` twice. `OverloadedLists` is only used in
the tests; as it is otherwise too easy to accidentally write `[] :: NonEmpty a`
without any warning.
Alternatives to this commit are:
- Just do the absolute minimal changes required to silence the warnings (ie
basically inline `head`/`tail`).
- Rewrite the operator tree code even further (maybe using more precise types)
such that the `NE.fromList` are not necessary anymore.
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| .. | ||
| Diff | ||
| Fixity | ||
| Parser | ||
| CabalInfoSpec.hs | ||
| FixitySpec.hs | ||
| OpTreeSpec.hs | ||
| PrinterSpec.hs | ||